摘要
本文研究了氯化三烷基苄基铵(7407)从氯化物体系中萃取钯的机理。结果表明,在pH为1.2—4.5和[Pd]≤1.o×10_(-3)M的条件下,钯的分配比和酸度与钯浓度无关.用等摩尔系列法、饱和法和斜率法确定了萃合物的组成。通过紫外一可见光谱法测定,表明氯化三烷基(艹卡)基铵萃取钯的机理属阴离子交换反应,其萃取方程式为:[R_3NCH_2-C_6H_5]CI(o)+HPdCl_4^-(A)[R_3NCH_2-C_6H_5]HPdCl_4(o)Cl^-(A)
The extraction mechanism of pallaadium from chloride system by trialkyl- benzyl ammonium chloride (7407) has been studied.The results show that the distribution ratio of palladium has nothing to do with acidity and concentra- tion of palladium at pH≥1.20 and[Pd]≤1.0×10^(-3)M.The composition of extracted complex has been determined as [R_3NCH_2C_6H_5]HPdCl_4 by the equimolar series method,saturated method and slope method.The extraction mechanism of palladium with trialkyl-benzyl ammonium besed on UV-vis spec- tra was proved to be an anion exchange reaction as follows: [R_3NCH_2C_6H_5]Cl_(0)+[HPdCl]_4^-_(A)[R_3NCH_2C_6H_5]HPdCl_(4(0))+Cl^-_(A)
出处
《化工冶金》
CSCD
北大核心
1989年第4期44-48,共5页
关键词
钯
氯化三烷基
bian基铵
萃取机理
mechanish of extraction
palladium
Trialkyl benzyl ammonium chloride
